Disalbe auto code completion even there's only one option
Hide auto-completion if only one completion option and it's been typed
Support use tab key to accept code completion option
fix hide soft keyboard by press 'back' button,
then click current focus text edit/line edit control,
soft keyboard won't show again
add features:
press enter key with line edit control will hide soft keyboard
jonyrock
marynate
sanikoyes
Juan Linietsky